Cognitive behavioural therapy has been shown to be effective in reducing anxiety and depression in cancer patients when provided within the context of individual sessions. We describe the application of a cognitive behavioural model to a group therapy context. This represents a novel approach to the psychological treatment of cancer patients. Fourteen breast cancer patients attending the Royal Marsden Hospital were included in an assessment of treatment outcome pre-and postgroup therapy. Outcome was assessed using the Hospital Anxiety and Depression (HAD) Scale and a study-specific visual analog measure relating to perceived efficacy of the therapeutic techniques. Rationale and organization of group therapy is described along with the preliminary pilot study results.